X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/raggedstone/blobdiff_plain/36a53ce255c40f7051820ffbaaac1dd646a83bfb..377c02420489dd18db3ce053a075d7eca4ae799b:/dhwk/source/DATA_MUX.vhd

diff --git a/dhwk/source/DATA_MUX.vhd b/dhwk/source/DATA_MUX.vhd
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+-- J.STELZNER
+-- INFORMATIK-3 LABOR
+-- 23.08.2006
+-- File: DATA_MUX.VHD
+
+library ieee ;
+use ieee.std_logic_1164.all ;
+ 
+entity DATA_MUX is
+	port
+	(
+	READ_SEL		:in		std_logic_vector( 1 downto 0);
+	ADDR_REG		:in		std_logic_vector(31 downto 0);
+	CBE_REGn		:in		std_logic_vector( 3 downto 0);
+	MUX_IN_XX0	:in		std_logic_vector( 7 downto 0);
+	MUX_IN_XX1	:in		std_logic_vector( 7 downto 0);
+	MUX_IN_XX2	:in		std_logic_vector( 7 downto 0);
+	MUX_IN_XX3	:in		std_logic_vector( 7 downto 0);
+	MUX_IN_XX4	:in		std_logic_vector( 7 downto 0);
+	MUX_IN_XX5	:in		std_logic_vector( 7 downto 0);
+	MUX_IN_XX6	:in		std_logic_vector( 7 downto 0);
+	MUX_IN_XX7	:in		std_logic_vector( 7 downto 0);
+	MUX_OUT			:out	std_logic_vector(31 downto 0);
+	READ_XX1_0	:out	std_logic;	
+	READ_XX3_2	:out	std_logic;
+	READ_XX5_4	:out	std_logic;
+	READ_XX7_6	:out	std_logic
+--READ_FIFO		:out	std_logic
+	);
+end entity DATA_MUX ;
+
+architecture DATA_MUX_DESIGN of DATA_MUX is
+
+	signal	MUX	:std_logic_vector(31 downto 0);
+	signal	SEL	:std_logic_vector( 7 downto 0);
+
+	signal	SIG_READ_XX1_0	:std_logic;
+	signal	SIG_READ_XX3_2	:std_logic;
+	signal	SIG_READ_XX5_4	:std_logic;
+	signal	SIG_READ_XX7_6	:std_logic;
+
+begin
+
+	SEL	<= ADDR_REG(3 downto 2) & CBE_REGn	&	READ_SEL ;	
+																																		
+	SIG_READ_XX1_0	<=	'1' when	SEL	=	"00110011"	else	'0';
+	SIG_READ_XX3_2	<=	'1' when	SEL	=	"00001111"	else	'0';
+	SIG_READ_XX5_4	<=	'1' when	SEL	=	"01110011"	else	'0';
+	SIG_READ_XX7_6	<=	'1' when	SEL	=	"01001111"	else	'0';
+
+
+									
+	MUX	<=	(X"00" 			& X"00" 			& MUX_IN_XX1	&	MUX_IN_XX0)	when	SIG_READ_XX1_0	=	'1' else 
+					(MUX_IN_XX3	&	MUX_IN_XX2  &	X"00"				& X"00"			)	when	SIG_READ_XX3_2	=	'1' else				
+					(X"00" 			& X"00" 			& MUX_IN_XX5	&	MUX_IN_XX4)	when	SIG_READ_XX5_4	=	'1' else 
+					(MUX_IN_XX7	&	MUX_IN_XX6  &	X"00"				& X"00"			)	when	SIG_READ_XX7_6	=	'1' else  	
+					(others => '0');																																				
+
+
+--	MUX	<=	(X"01" 			& X"23" 			& MUX_IN_XX1	&	MUX_IN_XX0)	when	SIG_READ_XX1_0	=	'1' else 
+--					(MUX_IN_XX3	&	MUX_IN_XX2  &	X"45"				& X"67"			)	when	SIG_READ_XX3_2	=	'1' else				
+--					(X"89" 			& X"AB" 			& MUX_IN_XX5	&	MUX_IN_XX4)	when	SIG_READ_XX5_4	=	'1' else 
+--					(MUX_IN_XX7	&	MUX_IN_XX6  &	X"CD"				& X"EF"			)	when	SIG_READ_XX7_6	=	'1' else  	
+--					(others => '0');																																				
+
+
+	MUX_OUT <= MUX ;
+
+
+	READ_XX1_0	<=	SIG_READ_XX1_0;			
+	READ_XX3_2	<=	SIG_READ_XX3_2;
+	READ_XX5_4	<=	SIG_READ_XX5_4;
+	READ_XX7_6	<=	SIG_READ_XX7_6;
+
+--READ_FIFO		<=	SIG_READ_XX3_2 or SIG_READ_XX5_4;--SIG_READ_XX5_4 nur fuer test
+
+end architecture DATA_MUX_DESIGN ;